Link system for controlling rolling movements



March 4 1924. 1,485,900

s. G. WINGQUIST LI N sYsTEM FOR CONTROLLING ROLLING MOVEMENTS FiledApril 1 3. 1921" s Sheets-Sheet 1 /'/v VEN 70 R.

March 4, 1924. 1,485,900 I s.G.mnNGQusT LINK SYSTEM FOR CONTROLLINGROLLING MOVEMENTS Filed April 15, 1921 s Sheets-Sheet.2

ATTORNE YS'.

March 4, 1924. 1,485,900

s. G. WINGQUIST LINK SYSTEM FOR CONTROLLING ROLLING MOVEMENTS FiledApril 13. 1921 3 Sheets-Sheet 5 IN VEN TOR ATTORNEYS.

Patented Mar. 4,

omrao srrs PAT I.

svnn eus'rarwmeeurs'r, or eor'rnnsoiea, swnnnn, v.assimaon r0 axrrnnonnenr svnnsxa KULLAGERFABRIKEN, or eorrnnnone, SWEDEN, 'Aooaronkrrou or SWEDEN.

I .LINK' SYSTEM FOR COIiITROLILING- ROLLING MOVEMENTS.

Application filed April 13, 1921. Serial No. 461,157. e

To all whom it may concern;

Be it known that I, SVEN GUSTAF WVING- oUIsr, a subject of the King ofSweden, residing at Gottenborg, in the Kingdom of Sweden, have inventeda new and useful Improved Link System for Controlling Rolling Movements,of which the following is a specification.

The object of the present invention is to produce a link system by meansof which a body of revolution, for instance a cylinder, may be caused toperform a rolling movement with a minimum of'sliding, whereby for largeangles of rolling, the movement of the cylinder will for all practicalpurposes act with a. true rolling effect; and with this and otherobjects in view, the in vention consists of the construction andarrangement of parts fully set forth in the specification to follow, andthe novel features of which will be pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a diagrammatic view of a. link system of well known form forcontrolling rolling movements.

Fig. .2 is a diagrammatioview of system embodying my invention.

F ig. 3,is a diagrammatic view to illustrate a. comparison of theactions of the link systems of'Figs. 1 and 2.-

Fig. i is a vertical sectional elevation of amachine having my improvedlink system incorporated therein.

Fig. 5 is a front elevation of the same.

Referring to the drawings: I

The well known link system shown diagrammatically in Fig. 1 by means ofwhich the cylinder C shall be caused to roll and slide upon the planeSurface P, includes a link a link or crank a rigidly attached to the:

shaft w integral with the cylinder and having a length equal to thelength of the radius of the cylinder. The said link system furtherincludes an. auxiliarylink Z2 pivotally and slidably connected to thefree end al of the link a and having its one end pivotally and slidablymounted at the point 0 where the rolling movement begins, the other endof the said auxiliary link being pivotally connected with a shaft xsituated at a distance therefrom corresponding to twice the radius ofthe cylinder 0. In the machine in which these parts would beincorporated, the shaft ac would be mounted in a slide (not shown)carrying the shaft m in the manner knownto those skilled in the art sothat the shaft m andshaft a' would be sustained in fixed relations toeach other. .The rolling movement is accomplishedin the known way byrectilineally displacingthe slide carrying the two relatively stationaryshafts 0c and 8 in the direction of rolling at one side, or both of thecentral; position of the link system, in which position the links a andb will cover one another and the end point 603 of the link a willcoincide with the point 0' where the rollingmovement begins. Anessential feature of this link system involves that the length of theauxiliary link 6 between the controlling shafts O and 00 may be varied.Another feature involves that the movable controlling shaft m describesa retilinear path Z in the rectilinear movement of the slide. i

The link; system according to this invention as shown in Fig. 2,likewise involves a link or crank anrigidly-connected to the shaft a,which shaft is integral with the cylinder C and an auxiliary link I)pivotally and slidably connected to the end point a. of said link at Atone end the link I) is fixed to a shaft 0 which is pivotally' mounted inthe machine frame as shown in Fig. awhile at its opposite end the linkcarries'a' shaft w" .movable with the slide trolling shaft :0 describesan arc-shaped path Z due to the fact that link I) has "a pivotal supportby means of the shaft 0 in the machine frames This construction andoperation of the parts brings about an improvementa to the rollingmovement, Fig. 3. i. With reference to Fig. 3, the reference character Zindicates the cycloid which as will more clearly appear from would'bedescribed by a given point of -the periphery of the cylinder O,provided the movement of the cylinder on the plane surface P were a purerolling movement. If, on the other hand, the rolling movement beaccomplished by means of the link system shown in Fig. 1, the said pointof the bring about a better rolling action, especially for large anglesof rolling, than that obtained by the link system shown in Fig. 1. FromFig. 3 it appears, moreover, that the two curves K and K, are situatedat opposite sides of the ideal cycloid Z, the movable controlling shaft02, of the auxiliary link 6 describing in the one case a straightlinedpath Z, Fig. 1, and in the other case'an arc-shaped path Z having itscentre in the point 0 where the rolling movement begins, as shown inFig. 2. From this it is evldent that if the movable controlling shafta", of the auxiliary link 6 be caused to describe an are situatedbetween the straight line Z and the arc Z a given point of the peripheryof the cylinder C will describe a curve corresponding more closely tothe ideal cycloid Z than is the case with any of the curves K and K,. InFigs. 4 and 5 a machine is illustrated in which the above described linksystem is incorporated. Here it will be seen that the slide A beforereferred to has mountedin it the shaft or stud a: to which is rigidlyconnected the link a carrying the terminal portion 'or pin a. The shaft0 before alluded to is pivotally mounted in the machine frame and isconnected with one end of the link I) which at its opposite end carriesthe shaft w carrying a slide Y movable in guideways Y carrie by theslide A, the stud a and link I; having a pivotal and sliding connectionwith each other as hereinbefore described. In the 'operation of thismechanism, by the rectilinear movement of the slide A, the link 6, dueto the connection link a therewith, will beiswung on its axis 0 in whichmovement the work blank 1) will be shifted bodily with reference to thegrinder E and at the same time will be given a rolling motion duringwhich action the shaft w of link 6 will describe the arc-shaped path Zshown in Fig. 2.

While the link system has been described above as used for obtainingrolling and sliding movements of a cylin er on a plane surface, itshould be understood that it is not limited to such a use but may beused for rolling and sliding a cylinder on or within another cylinder orfor rolling and sliding a cone on a plane surface or on another cone.

The link system is especially applicable to machines operating on theprinciple of rolling or on any other principle for gen erating toothedwheels in which the wheel blank shall be given a rolling movementrelatively to the tool.

' What I claim is 1. A link system for imparting a rolling and slidinginovementto a body of revolution, comprising in combination a crankrigidly connected to the axis of the bod of revolution and having alength equal to the radius of the said body of revolution, an auxiliarylink pivotally and slidably connected to the free end of said crank, astationary controlling axis. and a movable controlling axis for saidauxiliary link, the auxiliary link having a constant length between thesaid controlling axes as and for the purpose set forth.

2. A link system for imparting a rolling and sliding movement to a bodyof revolution, comprising in combination a crank rigidly connected tothe axis of the body of revolution and having. a length equal to theradius of the said body of revolution, an auxiliary link pivotally andslidably connected to the free end of said crank, a stationarycontrolling axis for said auxiliary link, situated at the point wherethe rolling movement is adapted to begin and a movable controlling axisfor said auxiliary link, the auxiliary link having a constant lengthbetween the said controlling axes as and for the purpose set forth.

3. A. link system for imparting a rolling and sliding movement to a bodyof revolution, comprising in combination a crank rigidly connected tothe axis of the body of revolution and having a length equalto theradius of the saidbody of revolution, an auxiliary link pivotally andslidably connected to the free end of said crank, and having a lengthapproximately equal to thrice the radius of the said body of'revolution,a stationary controlling axis: and a movable controlling axis for saidauxiliary link, the auxiliary link having a constant length between thesaid controlling axes as and for the purpose set forth.

In testimony whereof I have signed my name. I

SVEN eUsrAr-wINGoUisr.

